yeahh my dad is very good with DIY
i have been told it is too small and i do think it is a tad too small!
but i think it is a decent size
im doing some more on it tonight
hopefully i will get the rest of the mesh on
could they bite their way out or anything?
hopefully my little chippies will like the design too
Thanks 
Oh your dad made it. My grandad built my first cage.
Whats the dimentions? It looked quite a reasonable size from the pictures about the size of my old cage which was 3 1/2 foot length by 1 1/2 foot width (thats abit small, 2 1/2 or three foot would of been better but my grandad had to transport it to my house so it couldn't be huge) by six foot high. Maybe it looks bigger in the photos

Yes thats what i was meaning the wood could be gnawed/bitten out of. They have to chew to keep the teeth worn down as they constantly grow. My old cage had a wooden back wall which they started to bite through. The wood was thick but already they had done quite alot of damage in a short time so we abandoned the cage, they would of chewed through eventually and we bought cages instead which i wasn't happy about. I wanted to mend the cage but dad said no. The shop cages are really not big enough.
My White babies are chewers too they chewed one of their toys up and has chewed at the shelves but they can't bite out of the aviary as its completely meshed all the wood leading to outside. I'm glad we did that even though it was more work.
I really hope they don't gnaw your cage it would be a shame after all the work been put into it.